Ignition and control device for oven burners



Nov. 2, 1937.

B. L. MATTHEWS IGNITION AND CONTROL DEVICE FOR OVEN BURNERS Filed ooit 2o,

1951 2 Sheets-Sheet l l INToR Birc'hard LMatthew lull-II, nl

HIS ATTORN Nav.. 2, 1937.

B. MATTHEWS IGNITION AND CONTROL DEVICE FOB OVEN BURNERS Filed 061;'. 20, 1931 Sheets-Sheet 2v INVENTOR Birckard L.Ma/tthew5 BY @d HIS ATI'OR Patented Nov. 2, 1937 IGNITION AND coa-Rox. Davies Foa ovEN UaNERs i Birchard L. Matthews, Cleveland, Ohio, assigner to The Patrol Valve Company, Cleveland, Ohio, a corporation of Ohio Application October 20, 1931, Serial No. 569,968

Claims. (Cl. 15S-117.1)

This invention relates to ignition and control devices and in particular devices of the type disclosed for effecting the ignition and control of an inclosed gas burner by means of a remote pilot effecting .the ignition of the gas in the ash tube,

which flashes back and eiects the ignition oi the gas supplying main burnerl` The fue] supply ofthe pilot burner Ill is by way of the conduit I2- which is under control of cap 38.- Air inlet openings lo are provided above 5 burner and a thermos'tatic valve. 'avalve I3 and the needle adjusted gas and air 5 One of the objects of this invention is to vpromixing valve 55. The gas supply of the oven vide an improved safety ignition device for an inburner 4 is under the joint control of the manu- 'closed burner in which the ignition of such burner ally operable valve B, a thermostatically operated is eiected by means of a continuously operating oven regulator I4 and a thermallypactuated valve l0 ,pilot burner which is located at a' point remote I5. The over burner is arranged to be lighted l0 from the burner rand its housing. by an ignition burner I6.

A further object ofl this invention is to provide The control of the oven burner 4 is primarily a control device for inclosed gas burners which is eiected by the manually operable valve 8 which arranged to provide an ignition means for such communicates with the gas supplymanifold 6 as burner before its gas'supply can be turned on. shown. Upon the opening of the valve 8, gas is l5 With these and other objects in view, the insupplied to the conduit I1 which communicates vention consists in the novel construction, arwith the inlet side of the thermally actuated rangement and combination of parts, hereinafter valve I5. This Valve is normally in a closed podescribecl, illustrated in some of its embodiments sition. The valve i5 includes a valve body i8 in the accompanying drawings and particularly having a valve seat I 9 integrally formed there- 20 pointed out in the appended claims. with. A second valve seat 20 is provided by a In the drawings, Figure 1 is'a plan view of a closure cap 2i which is carried in an opening gas range illustrating one mode of practicing my. formed in the side of the valve body. A valve invention; Figure 2 is an enlarged side eievahead 22 operates-between the valve seats I9 and gli tional View, partly in section, showing my im- Zll to control the-flow of fuel therethrough 25 proved oven burner control. Figure 3 is a sec- The valve head 22 is secured to a valve stem tional view taken on line 3 3, Figure 1, and Fig- 23 operatively associated With e Suap-@Gell ure 4 is a sectional view taken on the axis of one mechanism 2l which is in tum connected byv of the needle adjusted valves. means of an adjustable rodl to a bimetallic 3@ Referring to Figure 1, the numeral vI indicates thermostatic bar or strip 26. The thermostatic 30 generally a conventional gas range having a plubar 26 is xedly secured by a bolt and nut 21 to `rality of top burners 2, and an inclosed oven 3 the housing 28. An auxiliary Sas burner 29 iS which is arranged to be heated by means of the Provided for Supplying heat t0 the thermostat oven burner d. The range issuppled with gas 26 for the actuation of the valve I5. The burner by means of a gas supply conduit 5 which com- 29 iS Supplied With gS by Way 0f the Valve portA 35 municates with the range manifold 6 from which 20, a conduit 30 and the needle adjusted eas and a plurality of valves 7 control the gas supply o air mixing valve 3i which provides the burner 29 the top burners 2. A similar valves is connected With e Combustible mixture 0f gas and ail' S0 that to the manifold t for controlling the gas supply this burner operates With a blue llame to of the oven burner il. The range is provided with The Valve body i8 is provided on its inlet side 40` a flash tube igniter 9 having a continuously opwith an opening in Which there 1S reCeiVed a terating pilot burner I0. The ash tubes II are ting 32 which is in communication withthe conopen at each end for the' purpose of conducting` duit 33. This conduit communicates with the gas from the burners 2 to the continuously operneedle adjusted gas and all' mixing valve 34,

ating pilot burner iii. which is arranged to supply a combustible mix- 45 The conduction of gas from the burners 2 to tureof 88S oud all' t0 the inltlOu burner l5 and the pilotburner Ill may be eiected by any oi the its ignition tube injecter 110221@ 35- usual methods such as an injection port drilled y The gas and air needle adjusted mixing valves in the side of each of the burners adjacent the 3l, 55 and 34 are oi' Similar construction and one 5i) open end of the associated flash tube which is o! them is shown in detail in Figure 4. This 50 supported by such a burner. Thus, when gas is valve includes a body portion 36 having a Dort 3l supplied to any of the burners 2, a certain porwith which an adjustable needle 38 cooperates tion of it is injected into a'flash tube which confor controlling the flow of gas therethrough. The

ducts it to the flame of the pilot burner I0 end of the valve body is provided with a closure 55 the gas injection port 31 for the purpose of Supplying air to the gas stream iiowlng through the valve. An adjustable cap 4I is provided for regulating the air supplied by Way of the openings 40. The injector nozzle 35 is positioned directly below a chimney 42 which is slotted at 43 for reception i of the set screw 44 so that itsposition may be adjusted with respect to the injector nozzle 35.

The chimney 42 is cut awayat its lower end as illustrated in Figure 3 of the drawings so that the injector nozzle 35 and the adjacent port of the burner I6 are ignitable one from the other. An L-shaped flash tube 45 is slidably received in the upper end of the chimney 42 and rests on a collar 46 rigid with the chimney. An air inlet port 41 is provided in the under side at the bend of the L-shaped iiash tube 45. The flash tube 45 terminates at a point adjacent the ame of the pilot burner I0 so that gas is conducted by this tube to the pilot and is ignitable thereby.

The ignition burner I6 is provided with a plurality of ports 48 which extend from a point adia cent to the injector nozzle 35, to the oven burner 4 which is in turn provided with flame supporting ports 49. The' outlet side of the thermally actuated valve I5 communicates with a conduit 50 which is connected to the inlet side of the thermostatically controlled oven regulator valve I4. The outlet side of the thermostatic valve I4 communicates with a conduit 5I which supplies gas to the gas and air mixing tube 52 of the oven burner 4. The valves l, 8, I3 and I4 do not form a part of this invention and they are not described in detail as they represent any Valve suitable for the purpose employed. The valve I5, considered by itself is disclaimed apart fromlthis invention and it forms in part the subject matter of application for United States Letters Patent, Serial No. 271,805, filed by Edmund J. TePas, April 21, 1928, which has resulted in Patent No. 1,842,334 issued January 19, 1932.

When it is desired to operate the oven burner, thevalve 8 is opened whereupon a supply of gas is admitted to the conduit Il. Under such conditions, th'e valve I5 normally would be occupying the position shown in Figure 2, wherein the valve head 22 is shown in contact with the seat I9,

'while the valve seat 20 is uncovered. With the parts in the position just described, the gas supplied by way of the conduit I1 passes through the port defined by the uncovered valve seat 20, and thence to the conduit 30 and the mixing valve 3|, which supplies a combustible mixture of gas and air to the auxiliary burner 29; While the above operation is taking place, the conduit 33 is supplied with gas which is carried to the mixing valve 34 which supplies a combustible mixture of Sas and air to the injector nozzle 35 and the associated ignition burner I6.

From the foregoing, it is apparent that when the manually operable oven control valve 8 is' turned on, gas is supplied to the burners I6, 29 and the nozzle 35 substantially simultaneously.

'Almost immediately upon the supplying of gas to these burners, the gas supplied to the nozzle 35 is conducted by the chimney "42 and its associated ash tube to the continuously operating pilot burner I0, whose flame serves to ignite the combustible` mixture emitted from the open end of this tube which is adjacent the flame of V`this pilot burner, whereupon a flash is produced in the tube which causes the ignition of the gas escaping from the nozzle 35 and the burners 26 and I6.

In a short time, the flame of the auxiliary Aburner 29vhas heated the thermostat 26 sumciently to cause its lower free end to shift to the left as viewed in Figure 2 effecting the opening of the valve I5 whereupon a supply of gas is admitted to the oven burner 4 by way of the conduits 50 and 5I and the oven regulator valve I4.

The gas admitted to the oven burner 4 is then ignited by the flame supported by the ignition burner I6. The device then operates under control of the thermostatic valve 'I4 which is provided with a manually settable handle 54 by means of which a predetermined temperature may be maintained in the oven. The ignition burner I6 is supplied with gas at full line pressure at all times and its operation is not affected by the Valve I4 which automatically controls 'the flow of gas to the oven burner, and as sometimes happens, this valve may cut down the flow of gas to the oven burner to such a point so that a slight draft or disturbance in the oven will cause its extinguishment.

Extinguishment of the oven burner under these conditions would cause no harm as it would be reignited immediately by the ignition burner I6 as this burner is operating at full capacity and hence is not so easily extinguished as is 'the oven burner under the conditions just outlined.

Upon the uncovering of the'valve seat I9, the valve head 22 is shifted into engagement with the valve seat 20, temporarily cutting off the supply of gas to the auxiliary burner 29. After this operation takes place, the thermostat 26 cools and its lower free end starts to move to the right as viewed in Figure 2, whereupon the spring 53 causes the valve head to follow the movement of the thermostat 26 and the associated rod 25 and snap-action mechanism 24, whereupon a supply of gas is again provided for the burner 29.

In this manner, when the valve Bis open the gas supply of the burner 29 is regulated so as to provide an amount of heat just suiiicient to maintain the valve head 22 in open valve position with respect to its seat 26.

From the foregoing, it is apparent that I have provided a safety control and ignition means for an inclosed burner in which the ignition of the burner is effected by means of a remote pilot and an associated ignition burner having a portion adjacent the inclosed burner. The ignition burner .by reason of being supplied at all times with a gas supply at full line pressure, is not apt to be readily extinguished as is the burner which it serves to ignite, such burner being under control of a thermostatic valve which increases and decreases its gas supply causing it to burn at times with a small name which is apt to be easily extinguished.

The provision of the thermally actuated valve I5 invests the appliance with a high degree of safety as the use of this valve necessitates the presence of an ignition flame for the oven burner before .it can be supplied with gas. 'I'he use of an ignition burner I6 spanning part of the distance between the oven burner and the pilot light 'provides a positive and safe means for igniting departing from my invention as defined in the appended claims.

Having thus described my invention, what I claim is:

l. In a gas burner control and ignition device,

in combination, a main heating burner. a remote-l ly positioned continuously operating pilot burner located outside the range of normal lighting proximity with respect to said main burner, an ignition burner located in lighting proximity to said main burner, an injection nozzle provided by said ignition burner, and a a'sh tube having a vertically disposed portion adjustably secured to said ignition burner in gas conducting relation above said nozzle for conveying gas to said pilot burner and effecting the ignition of said ignition burner.

2. A device of the kind described, a main burner, a constant pilot remote therefrom, `an ignition burner for said main burner and remote from said constant pilot, an auxiliary burner in ignitible relation with the ignition dburner, said 'burners being connected with a source of fuel,

means for controlling the valve, an auxiliary burner controlling the temperature responsive means of said valve, a pilot disposed remotely from said main burner, an elongated ignition burner in ignitible relation with said main burn- 0 er, a valve in the fuel line for causing fuel to be from said ignition burner to said pilot whereby to light said ignition burner upon opening of said second valve, and said auxiliary burner being located adjacent to and ignitible from said ignition burner.

4. A device of the character described comf prising a casing, a main burner within said casing, a fuel line therefor, a' valve in `,the fuel line, temperature responsive means for controlling the valve, an auxiliary burner controlling the temperature responsive means, a -constant pilot, an elongated ignition burner extending through said casing and in ignitible relation with said main burner, a valve in the fuel line for causing fuel to be supplied to the first valve and to said ignition burner, said valves, temperature respon.- sive means, and a portion of said ignition burner being disposed outside said casing, and means for conducting fuel from the external portion of said ignition burner to said pilot whereby to light said ignition burner upon opening of saidv fuel duct from the ignition burner connected with the fuel line ahead of said valve, means conveying fuel from the ignition Vburner to said .pilot whereby to ,ignite said ignition burner, a fuel duct from said valve to said auxiliary burner, and means controlling the supply of fuel through said last duct dependent upon the opening and Yclosing of said valve.

BIRCHAl-'iJD` L. MA'I'I'HEWS. 

